SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Government subsidies and Income taxes (Details) ¥ in Millions, $ in Millions |
12 Months Ended | ||||
|---|---|---|---|---|---|
|
Dec. 31, 2025
CNY (¥)
|
Dec. 31, 2025
USD ($)
|
Dec. 31, 2024
CNY (¥)
|
Dec. 31, 2023
CNY (¥)
|
Dec. 31, 2025
USD ($)
|
|
| SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES | |||||
| Government subsidies | ¥ 96.4 | $ 13.8 | ¥ 90.5 | ¥ 71.2 | |
| Government Assistance, Statement of Income or Comprehensive Income [Extensible Enumeration] | Other income, net | Other income, net | |||
| Accrued interest and penalties | ¥ (5.0) | 7.2 | ¥ 7.6 | $ (0.7) | |
| Accrued balance of interest and penalties | ¥ 14.4 | ¥ 19.4 | $ 2.1 | ||